<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
   let {uname,age} = {uname:'小小',age:18
}

   function fn({age}){
    console.log(age);
   }
   fn({uname:'小小',age:18,data:'加油'})
    </script>
</body>
</html>